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Chapter 4: Motherboard Connections
LAN Ports
Two LAN ports (LAN1, LAN2) are located on the rear I/O back panel. In addition, a dedicated
BMC_LAN Port is located above the USB0/1 ports. All of these ports accept RJ45 cables.
Please refer to the LED Indicator section for LAN LED information.
LAN Port
Pin Definitions
Pin#
Definition
Pin#
Definition
1
TD0-
11
P3V3_Dual
2
TD0+
12
Act LED (Yellow)
3
TD1-
13
Link 1000
(Amber)
4
TD1+
14
Link 100 LED
(Green)
5
TD2-
15
GND
6
TD2+
16
GND
7
TD3-
17
GND
8
TD3+
18
GND
9
COMMCT
10
GND
BMC LAN
Pin Definitions
Pin#
Definition
Pin#
Definition
9
19
GND
10
TD0+
20
Act LED
(Yellow)
11
TD0-
21
Link 100 LED
(Green)
12
TD1+
22
Link 1000 LED
(Amber)
13
TD1-
23
SGND
14
TD2+
24
SGND
15
TD2-
25
SGND
16
TD3+
26
SGND
17
TD3-
18
GND
Universal Serial Bus (USB) Ports
There are two USB 3.0 ports (USB0/1) located on the I/O back panel. Refer to the board
layout below for the location.
Back Panel USB 0/1 (3.0)
Pin Definitions
Pin#
Definition
Pin#
Definition
A1
VBUS
B1
Power
A2
D-
B2
USB_N
A3
D+
B3
USB_P
A4
GND
B4
GND
A5
Stda_SSRX-
B5
USB3_RN
A6
St
B6
USB3_RP
A7
GND
B7
GND
A8
Stda_SSTX-
B8
USB3_TN
A9
St
B9
USB3_TP
